Title:
ランプ装置
Document Type and Number:
Japanese Patent JP5373373
Kind Code:
B2
Abstract:
A light utilization efficiency of a high-pressure discharge lamp is improved even in a case of reducing the size of a reflection mirror without using an auxiliary reflection mirror. In a lamp device where a portion of lights emitted from a discharge bulb (4) to the periphery thereof in forward and backward directions for a predetermined range of angle is reflected at a concave reflection mirror (3) and illuminated to a light collection area (SP) of a predetermined size formed forward of the lamp, a prism surface (12S) having an angle of refracting or deflecting at least a portion of lights emitted from the discharge bulb (4) that is not reflected at the concave reflection mirror (3) to the light collection area (SP) is formed to the outer peripheral surface of the discharge bulb (4).
Inventors:
Uehara Juno
Takashi Ibi
Yousuke Kano
Higuchi Toshinao
Takashi Ibi
Yousuke Kano
Higuchi Toshinao
Application Number:
JP2008297196A
Publication Date:
December 18, 2013
Filing Date:
November 20, 2008
Export Citation:
Assignee:
Iwasaki Electric Co., Ltd.
Fujii Optical Co., Ltd.
Fujii Optical Co., Ltd.
International Classes:
F21S2/00; H01J61/86; F21V13/04; G02B5/04; G02B5/10; G02B19/00; G03B21/14; F21Y101/00
Domestic Patent References:
| JP2005070429A | ||||
| JP2006294268A | ||||
| JP2008112622A | ||||
| JP2004093653A | ||||
| JP2007073276A | ||||
| JP2006292903A |
Attorney, Agent or Firm:
Katsufumi Sawano
Akira Kawajiri
Akira Kawajiri